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What are async methods in JavaScript?
The async function declaration as the name suggests defines an asynchronous function. This function returns an AsyncFunction object.
Syntax
Here’s the syntax −
async function functionname([param[, param[, ... param]]]) { statements to be executed } Example
Let’ see an example, which prints the result after 5 seconds −
<html> <body> <script> function displayFunction(num) { return new Promise(resolve => { setTimeout(() => { resolve(num); }, 5000); }); } async function add2(num) { const x = displayFunction(7); const y = displayFunction(5); return num * await x * await y; } add2(15).then(result => { document.write("Multiplication Result (after 5 seconds): "+result); }); </script> </body> </html>
Updated on: 2020-06-15T13:18:08+05:30
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